/*
 * Copyright 2016 Google Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.turbine.binder.lookup;

import org.checkerframework.checker.nullness.qual.Nullable;

/** A scope that defines types, and supports qualified name resolution. */
public interface Scope {
  /**
   * Performs qualified name lookup on the given {@link LookupKey}, and returns either a {@link
   * LookupResult} or else {@code null} indicating that the name could not be resolved.
   */
  @Nullable
  LookupResult lookup(LookupKey lookupKey);
}
